Rotor with cooling fluid flow channels formed in permanent magnets

Abstract

A rotor of an electrical rotating device includes a rotor core, plural permanent magnets mounted on an outer circumference of the rotor core, a retaining sleeve that holds the permanent magnets from their outer side, a cooling fluid flow channel formed on each surface of the permanent magnets on a side of the retaining sleeve [or on each surface on a side of the rotor core], and a seal ring. The retaining sleeve is configured of plural divided sleeves divided along a direction of a rotation axis of the rotor. A seam is formed between adjacent divided sleeves in the plural divided sleeves. The seal ring covers the seam from an outer circumferential side [or an inner circumferential side].

What is claimed is: 
     
       1. A rotor of an electrical rotating device, the rotor comprising:
 a rotor core; 
 a plurality of permanent magnets mounted on an outer circumference of the rotor core; 
 a retaining sleeve that is configured of a plurality of divided sleeves divided along a direction of a rotation axis of the rotor and holds the plurality of permanent magnets from an outer side of the plurality of permanent magnets; 
 a seam formed between adjacent divided sleeves in the plurality of divided sleeves; 
 a cooling fluid flow channel formed on each surface of the plurality of permanent magnets on a side of the retaining sleeve; and 
 a seal ring that covers the seam from an outer circumferential side or an inner circumferential side. 
 
     
     
       2. The rotor of the electrical rotating device according to  claim 1 , wherein
 the seam comprises one or more seams, and 
 the seal ring is a single hollow cylindrical member that covers all of the seams, and disposed between the retaining sleeve and the plurality of permanent magnets. 
 
     
     
       3. The rotor of the electrical rotating device according to  claim 1 , wherein
 the seam comprises one or more seams, and 
 the seal ring is a single hollow cylindrical member that covers all of the seams, and disposed on an outer circumferential face of the retaining sleeve. 
 
     
     
       4. The rotor of the electrical rotating device according to  claim 1 , wherein
 the seam comprises one or more seams, and 
 the seal ring is configured of a plurality of annular members which are aligned in the direction of the rotation axis and each of which covers at least one of the seams, and disposed on an outer circumferential face of the retaining sleeve. 
 
     
     
       5. The rotor of the electrical rotating device according to  claim 1 , wherein
 the seal ring is made of metal. 
 
     
     
       6. The rotor of the electrical rotating device according to  claim 1 , wherein
 the seal ring is made of CFRP.